mounting hub adapter
thingiverse
Pololu Universal Aluminum Mounting Hub for 6mm Shaft- Remix from grabcad by Nathan Fredrickson https://grabcad.com/library/pololu-universal-aluminum-mounting-hub-for-6mm-shaft-4-40-holes-1 5mm shaft converts a 4 hole hub to a 6 hole NOTE: I fine tuned the diameter sizing of the holes and shaft to my Nema 17 without calibrating the flow rate of my printer
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